NM_001099404.2:c.5494C>G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 3P and 6B. PM2PP2BP4_ModerateBS1

The NM_001099404.2(SCN5A):c.5494C>G(p.Gln1832Glu) variant causes a missense change. The variant allele was found at a frequency of 0.0000867 in 1,613,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00040 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000054 ( 0 hom. )

Consequence

SCN5A
NM_001099404.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:4O:1

Conservation

PhyloP100: 4.72

Variant links:

Genes affected

SCN5A (HGNC:10593): (sodium voltage-gated channel alpha subunit 5) The protein encoded by this gene is an integral membrane protein and tetrodotoxin-resistant voltage-gated sodium channel subunit. This protein is found primarily in cardiac muscle and is responsible for the initial upstroke of the action potential in an electrocardiogram. Defects in this gene have been associated with long QT syndrome type 3 (LQT3), atrial fibrillation, cardiomyopathy, and Brugada syndrome 1, all autosomal dominant cardiac diseases. Alternative splicing results in several transcript variants encoding different isoforms. [provided by RefSeq, May 2022]

SCN5A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the SCN5A gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 99 curated pathogenic missense variants (we use a threshold of 10). The gene has 60 curated benign missense variants. Gene score misZ: 2.7504 (below the threshold of 3.09). Trascript score misZ: 4.7729 (above the threshold of 3.09). GenCC associations: The gene is linked to progressive familial heart block, type 1A, Brugada syndrome, familial sick sinus syndrome, short QT syndrome, paroxysmal familial ventricular fibrillation, progressive familial heart block, long QT syndrome 3, familial atrial fibrillation, catecholaminergic polymorphic ventricular tachycardia, dilated cardiomyopathy, dilated cardiomyopathy 1E, arrhythmogenic right ventricular cardiomyopathy, Brugada syndrome 1, atrial standstill, familial isolated dilated cardiomyopathy, familial long QT syndrome, sick sinus syndrome 1.

BP4

Computational evidence support a benign effect (MetaRNN=0.14536268).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000401 (61/152270) while in subpopulation AFR AF= 0.0014 (58/41560). AF 95% confidence interval is 0.00111. There are 0 homozygotes in gnomad4. There are 28 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCN5A	NM_001099404.2 link	c.5494C>G	p.Gln1832Glu	missense_variant	Exon 28 of 28	ENST00000413689.6	NP_001092874.1	Q14524H9KVD2
SCN5A	NM_000335.5 link	c.5491C>G	p.Gln1831Glu	missense_variant	Exon 28 of 28	ENST00000423572.7	NP_000326.2	Q14524-2Q86V90

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SCN5A	ENST00000413689.6 link	c.5494C>G	p.Gln1832Glu	missense_variant	Exon 28 of 28	5	NM_001099404.2	ENSP00000410257.1		H9KVD2
SCN5A	ENST00000423572.7 link	c.5491C>G	p.Gln1831Glu	missense_variant	Exon 28 of 28	1	NM_000335.5	ENSP00000398266.2		Q14524-2

Frequencies

GnomAD3 genomes

AF:

0.000388

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00135

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000601

AC:

AN:

249442

Hom.:

AF XY:

0.0000370

AC XY:

AN XY:

135300

show subpopulations

Gnomad AFR exome

AF:

0.000709

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000540

AC:

AN:

1461610

Hom.:

Cov.:

AF XY:

0.0000591

AC XY:

AN XY:

727092

show subpopulations

Gnomad4 AFR exome

AF:

0.00108

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000279

Gnomad4 OTH exome

AF:

0.000133

GnomAD4 genome

AF:

0.000401

AC:

AN:

152270

Hom.:

Cov.:

AF XY:

0.000376

AC XY:

AN XY:

74454

show subpopulations

Gnomad4 AFR

AF:

0.00140

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.000302

ESP6500AA

AF:

0.000702

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000743

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:4Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3Benign:2

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jan 21, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Sep 10, 2020

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 04, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 31983221, 30193851, 20129283, 28370132, 23861362, 29728395, 24631775, 25119684, 16521247, 23414114, 22840528) -

Brugada syndrome

Benign:1Other:1

Jun 24, 2013

Biesecker Lab/Clinical Genomics Section, National Institutes of Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: research

- -

Cardiovascular Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

This variant has been reported as associated with Brugada syndrome in the following publications (PMID:16521247;PMID:20129283). This is a literature report, and does not necessarily reflect the clinical interpretation of the Imperial College / Royal Brompton Cardiovascular Genetics laboratory. -

not specified

Uncertain:1

Aug 03, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Gln1832Glu variant in SCN5A has been reported in 2 individuals with Brugad a syndrome, 1 infant with sudden death, and 1 individual with focal epilepsy (Ar bustini 2005, Kapplinger 2010, Partemi 2015, Morganstein 2015). The variant has also been identified by our laboratory in 1 adult and 1 infant with DCM, and 1 i ndividual with VT. In vitro functional studies provide some evidence that the p. Gln1832Glu variant may impact protein function (Morganstein 2015), although thes e types of assays may not accurately represent biological function. The p.Gln183 2Glu variant has also been identified in 0.1% (8/9806) of African chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP r s199473320). The affected amino acid is not well conserved in evolution, raising the possibility that a change may be tolerated. Other computational prediction tools do not provide strong support for or against an impact to the protein. In summary, the clinical significance of the p.Gln1832Glu variant is uncertain. -

Long QT syndrome

Uncertain:1

Jul 29, 2016

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiac arrhythmia

Uncertain:1

Dec 16, 2022

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces glutamine with glutamic acid at codon 1832 of the SCN5A protein. Computational prediction tools and conservation analyses are inconclusive regarding the impact of this variant on the protein function. An experimental functional study has shown that this variant may impact sodium channel function due to protein trafficking defects (PMID: 28370132). This variant has been reported in three individuals affected with or suspected of having Brugada syndrome (PMID: 20129283, 32893267, 36291626, in an infant affected with sudden death who also carried SCN5A p.Arg1944* variant (PMID: 24631775), and in an individual affected with epilepsy (PMID: 25119684). This variant has also been identified in 28/280826 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

Cardiovascular phenotype

Benign:1

May 24, 2021

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

CardioboostCm

Uncertain

0.23

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Uncertain

0.010

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.40

.;.;.;.;.;T;.;.;.

Eigen

Benign

0.063

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.91

.;D;D;D;D;D;D;.;D

M_CAP

Pathogenic

0.52

MetaRNN

Benign

0.15

T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.48

MutationAssessor

Benign

0.17

.;.;.;.;.;N;.;.;.

PrimateAI

Benign

0.46

PROVEAN

Benign

-0.87

N;N;N;N;N;N;N;N;N

REVEL

Uncertain

0.53

Sift

Uncertain

0.0070

D;D;D;D;D;D;D;D;D

Sift4G

Uncertain

0.022

D;D;D;D;D;D;D;D;D

Polyphen

0.76

P;B;.;P;.;P;B;.;.

Vest4

0.17

MVP

0.62

MPC

0.85

ClinPred

0.074

GERP RS

4.8

Varity_R

0.39

gMVP

0.96

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over